Trigger guard
From Gunsopedia

Trigger guard of a SG 550 rifle
A trigger guard is a loop surrounding the trigger of a firearm and protecting it from accidental discharge.
Some assault rifles can have their trigger guard removed or positioned as not to impair firing with gloves in Arctic conditions.

Trigger guard of the FAMAS in Arctic conditions
Other devices such as inhalers, crossbows and power tools may also have trigger guards.
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